It is all dynamic content going forward scenarios where a cache flush would be required 1) an article is updated 2) category is updated with a list of articles. we syndicate content to abut 150 partner and will have same article/category with a different URL doesn't squid cache based on the url? when you update content on your cms - how does squid know to update it's cache? JB On Thu, Apr 21, 2011 at 12:10 PM, Ron Wheeler <rwheeler@xxxxxxxxxxxxxxxxxxxxx> wrote: > Are you sure that you need to do this? > Squid should be able to tell the difference between static and dynamic > content. > > We have a dynamic JSR-168/268 portal based on Tomcat and Jetspeed sitting > behind Apache and Squid Âand we have never had to intervene with Squid for 3 > years. > We also have lots of Wordpress CMS sites. > > The user gets the latest information on every page load regardless of the > URL being the same. > > What exactly would cause you to trigger a flush of the cache? > > Ron > > > On 21/04/2011 11:30 AM, Jawahar Balakrishnan (JB) wrote: >> >> I would rather not do a restart of anything unless absolutely required >> >> Here are the challenges we face >> >> 1) We are trying to deploy Suqid as a reverse-proxy in front of a CMS >> 2) We want to trying find a balance between Âkeeping the content fresh >> without affecting performance by frequently expiring content. >> >> Our current reverse proxy solution allow us to flush the entire cache >> without having to restart but in limited testing Squid seemed to >> perform much better and we would prefer to use Squid but still retain >> the functionality of being able to flush the entire cache periodically >> via cron or when in case of an emergency. >> >> Cache-control headers are fine and will work in case of limited number >> of objects. >> >> Thanks >> JB >> >> >> On Tue, Apr 19, 2011 at 7:27 PM, Amos Jeffries<squid3@xxxxxxxxxxxxx> >> Âwrote: >>> >>> On Tue, 19 Apr 2011 11:14:55 -0400, Jawahar Balakrishnan (JB) wrote: >>>> >>>> I am looking to deploy Squid as a reverse proxy and i had couple of >>>> questions. We currrently use Bluecoat and Sun Web proxy and i am able >>>> to do the following things >>>> >>>> 1) How would i flush objects from cache? >>> >>> The whole lot: >>> Âhttp://wiki.squid-cache.org/SquidFaq/ClearingTheCache >>> >>> or individually via: >>> ÂHTTP "PURGE" requests >>> ÂHTCP "CLR" requests >>> >>> Âsquidpurge tool commands. >>> >>> >>>> 2) Can i flush the entire cache without restarting Squid? >>> >>> Yes ... but it takes a LONG time to do N objects individually. >>> Restart without a cache to load takes milliseconds. >>> >>>> 3) Can i set the configuration to expire objects at a certain time >>>> every day regardless of when the object was cache during the previous >>>> 24 hours? >>> >>> Use of the Expiry and Cache-Control mechanisms properly can do just about >>> anything. Correct use will make all proxies not just your reverse one >>> handle >>> the site fine and remove a lot of customer problems. >>> >>> Objects which arrive with header "Expires: XX" will expire at XX >>> timestamp >>> and be replaced on their next use. >>> >>> >>> >>> Amos >>> >>> > >
